On 2010/10/31 2:32, M.-A. Lemburg wrote:
M.-A. Lemburg wrote:
Hirokazu Yamamoto wrote:
Hello. I found several codes using PyMem_Free to free
allocated memory with PyMem_MALLOC (ie: PyUnicode_AsWideCharString)
Is it safe?
Within the interpreter: yes.
In extensions: depends on the platform, but probably not.
The macros provide faster access to the C lib malloc calls.
The functions need to be used in extensions in case the interpreter will
free the resource or the extension wants to free an interpreter
allocated resource. They provide access to the malloc calls
used by the interpreter, which may operate on a different heap
than the extensions.
Within an extension the macros use the extension heap.
A subtle, but important difference.
BTW: If you were referring to extensions using PyMem_Free()
to deallocate memory allocated in the interpreter using
PyMem_MALLOC(), then that's exactly how things should be
done.
I was referring to use of the two mentioned APIs within
an extension.
Thank you for reply, probably I could understand.
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